Tread portion of an automobile tire



FIG. 1 is a front view of a tread portion of an automobile tire;

FIG. 2 is a perspective view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a fragmentary enlarged view showing the details of the treadportion thereof;

FIG. 6 is an end view taken along line 6-6 in FIG. 5; and,

FIG. 7 is an end view taken along line 7-7 in FIG. 5.

In the drawings, the broken lines defining the sidewall and the innerbead of the tire depict environmental subject matter that forms no partof the claimed design.

The ornamental design for a tread portion of an automobile tire, asshown and described.